CN102321779A - Converter smoke radiation type waste heat boiler recovery system - Google Patents
Converter smoke radiation type waste heat boiler recovery system Download PDFInfo
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- CN102321779A CN102321779A CN201110311056A CN201110311056A CN102321779A CN 102321779 A CN102321779 A CN 102321779A CN 201110311056 A CN201110311056 A CN 201110311056A CN 201110311056 A CN201110311056 A CN 201110311056A CN 102321779 A CN102321779 A CN 102321779A
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Abstract
The invention discloses a converter smoke radiation type waste heat boiler recovery system, comprising a three-way valve, a settling chamber, a water-spraying cooling device, a radiation type waste hat boiler and a heat accumulator. When oxygen content of smoke reaches the standard, the three-way valve opens a gate communicated with the settling chamber, high temperature smoke after being subjected to dust removal by virtue of the settling chamber is fed into the radiation type waste heat boiler, heat exchange is carried out by virtue of a smoke flow equalizing chamber, a water-cooling radiation heat exchange chamber, an intermediate settling chamber of a boiler and a convection heat exchange chamber, dust content and temperature of the smoke are greatly reduced, then the smoke is fed into a dust remover to remove dust and then is recovered; when the oxygen content of the smoke exceeds standard, the high-temperature smoke is directly subjected to water spraying and cooling by virtue of the water-spraying cooling device, the smoke is fed into the dust remover to remove dust and then is directly discharged. Clearance type steam generated by the waste heat boiler enters into the heat accumulator to be subjected to pressure stabilization, so as to be changed into continuous steam, and the continuous steam is applicable to production and power generation. The converter smoke radiation type waste heat boiler recovery system disclosed by the invention can fully recover heat of converter smoke, the recovered steam quantity is increased by more than 25%, dust removal water consumption is greatly reduced, and the system disclosed by the invention can run stably and reliably.
Description
Technical field
The present invention relates to a kind of converter gas radiation formula waste heat boiler recovery system; Specifically can reclaim the heat of high-temperature flue gas that converter is discharged efficiently, reduce funnel temperature to greatest extent, guarantee the dust removal installation safe operation; Reduce the dedusting power consumption, belong to the energy-conserving and environment-protective technical field that converter is produced.
Background technology
In the converter steelmaking production process, contain a large amount of CO in the flue gas of being discharged, have two kinds of ways to handle this flue gas: the use that acts as a fuel of (), the flue gas that adopts not combustion method to reclaim this CO of containing, the flue gas top temperature of this kind mode converter is about 1800 ℃; Two, adopt combustion method to feed excessive air GO is burnouted, through the dedusting discharging, the funnel temperature of this kind mode is up to 2200 ℃ then.The second way owing to caused the loss of fuel, does not adopt in mammoth conveter technology at present.To first kind of processing mode, adopt evaporated flue that flue-gas temperature is reduced to 800～1000 degree now usually, through the water spray mode flue-gas temperature is directly dropped to below 200 ℃ again, at last through reclaiming after the fly-ash separator dedusting or discharging.The shortcoming of this mode is: (one), evaporated flue have only reclaimed the heat more than 800～1000 ℃, have wasted the waste heat in 800～1000 ℃ of flue gases; (2), be to have increased the water consumption.
Summary of the invention
Goal of the invention: in order to overcome the deficiency that exists in the prior art, providing a kind of is the nucleus equipment residual neat recovering system with T-valve and radiation formula waste heat boiler, takes turns switch through T-valve and prevents flue gas explosion; Reclaim 800～1000 ℃ flue gas heat through the cooling of radiation formula waste heat boiler; Can reclaim the heat energy in the flue gas efficiently, and abundant cooling down high-temperature flue gas, satisfy the safe operation requirement of dust-removal system; Improve efficiency of dust collection, improve the energy-conservation and Environmental Protection Level of converter production technique.
Technical scheme: converter gas radiation formula waste heat boiler recovery system of the present invention; The movable flue, converter that comprises converter be flue, T-valve, settling pocket flue, settling pocket, settling pocket smoke outlet flue, spray cooling device, boiler flue, radiation formula waste heat boiler, thermophore, deoxygenator fixedly; Fixedly press the dress T-valve in the bend pipe top of flue in converter; One end of T-valve and the converter fixedly outlet on the flue link to each other; The other end connects the settling pocket flue, and the 3rd end connects the flue of spray cooling device.
Settling pocket of the present invention links to each other with the radiation formula waste heat boiler through the boiler flue of settling pocket smoke outlet flue, radiation formula waste heat boiler.
Radiation formula waste heat boiler of the present invention is provided with drum, flue gas flow equalizing chamber, water-cooled radiation heat transfer chamber, boiler intermediate sedimentation chamber, ash exhauster, convection heat-exchange chamber; Said boiler flue one end connects the smoke outlet flue of settling pocket; The other end connects the flue gas flow equalizing chamber of radiation formula waste heat boiler; The flue gas flow equalizing chamber connects water-cooled radiation heat transfer chamber front end; Rear end, water-cooled radiation heat transfer chamber connects boiler intermediate sedimentation chamber, and boiler intermediate sedimentation chamber connects the convection heat-exchange chamber front end, and the rear end of convection heat-exchange chamber links to each other with the exit flue of radiation formula waste heat boiler.
By the outer steam-pipe that supplies is housed, supply to be parallel with on the steam-pipe thermophore outside on the drum of radiation formula waste heat boiler of the present invention; Indoor at the water-cooled radiation heat transfer by dress radiation water-cooled screen.
Radiation water-cooled screen of the present invention is welded into the screen formula through steel plate each other by row's steel pipe; It is indoor that the suspension of described radiation water-cooled screen is installed in the water-cooled radiation heat transfer; The upper end of said radiation water-cooled screen links to each other with drum through pipeline, header, and the lower end of described radiation water-cooled screen links to each other with drum through pipeline, header.
By having adorned vaporizer, high-temperature economizer and low-level (stack-gas) economizer, the high-temperature economizer outlet is connected with drum through pipeline in the convection heat-exchange chamber of the present invention, and the high-temperature economizer import links to each other with deoxygenator through pipeline, water pump.
Bottom, boiler intermediate sedimentation chamber of the present invention is by the dress ash exhauster.
Flue gas flow of the present invention is: 1300～1800 ℃ of high-temperature flue gas that in the process of bessemerizing, will produce, to the flue gas that is produced, at first detect the oxygen level in the flue gas: (O when () requires when the satisfied recovery of oxygen level
2Concentration＜1%), T-valve is opened the valve that leads to settling pocket and radiation formula waste heat boiler, closes the valve that leads to the spray cooling device simultaneously; High-temperature flue gas will get into settling pocket through the settling pocket flue, in settling pocket, remove the macrobead dust in the flue gas, and high-temperature flue gas gets into the current-sharing chamber of radiation formula waste heat boiler through the boiler high temperature flue then; The current-sharing chamber makes flue gas evenly get into water-cooled radiation heat transfer chamber, and after high-temperature flue gas and radiation water-cooled screen and the membrane wall heat exchange, flue-gas temperature will decline to a great extent; Usually flue-gas temperature is reduced to 400～600 ℃, and the volume of flue gas reduces significantly, and flue gas flow rate also significantly reduces; Get into boiler intermediate sedimentation chamber this moment, carries out final dusting, and the ash fall of part larger particles is got off; Flue gas gets into convection heat-exchange chamber then, in uphill process with vaporizer, high-temperature economizer, low-level (stack-gas) economizer heat exchange after, the temperature of flue gas＜150 ℃; Discharge through the boiler exhaust gas flue, send the fly-ash separator dedusting after, reclaim the use that acts as a fuel by gas holder; (2) (O when oxygen level exceeds standard
2Concentration＞1%); T-valve will be closed the valve that leads to settling pocket and radiation formula waste heat boiler; Open the valve that leads to the spray cooling device simultaneously, open the water spray valve, high-temperature flue gas will get into the spray cooling device and lower the temperature; Flue gas after the cooling (temperature＜200 ℃) discharges after sending the fly-ash separator dedusting.
Steam flow process of the present invention is: soft water make up water or steam turbine condensed water are sent into the deoxygenator deoxygenation after heating through low-level (stack-gas) economizer, and the water after the deoxygenation is after the high-temperature economizer heating is delivered in the service pump pressurization; Send into drum, the water in the drum absorbs flue gas heat through radiation water-cooled screen, membrane wall and vaporizer, produces steam; Steam in the drum links to each other with thermophore through the outer confession steam-pipe on drum top; Through thermophore, make the outer pressure-stabilisation that supplies steam, satisfied production and life are used; The steam that the radiation formula waste heat boiler is produced is parallelly connected with the steam that gasification cooling flue is produced.
The present invention compared with prior art has the following advantages:
The present invention has fully reclaimed the heat of converter high-temperature flue gas, has the thermo-efficiency height, with existing recovery system relatively, can increase the quantity of steam 25% or more, and be absolutely dry method dedusting, and then reduce the dust-removal system power consumption significantly and water consumes the condition of having created.
Description of drawings
Fig. 1 is a converter gas radiation formula waste heat boiler recovery system synoptic diagram of the present invention (embodiment one).
1; Converter 2; Movable flue 3; Converter is flue 4 fixedly; Gasification cooling flue drum 5; Spray cooling device 6; T-valve 7; Settling pocket flue 8; Settling pocket smoke outlet flue 9; Drum 10; Current-sharing chamber 11; Water-cooled radiation heat transfer chamber 12; Membrane wall 13; The outer steam-pipe 14 that supplies; Radiation formula waste heat boiler 15; Boiler exhaust gas flue 16; Thermophore 17; Deoxygenator 18; Service pump 19; Low-level (stack-gas) economizer 20; High-temperature economizer 21; Vaporizer 22; Convection current radiation heat transfer chamber 23; Ash exhauster 24; Radiation water-cooled screen 25; Boiler intermediate sedimentation chamber 26; Settling pocket 27; Settling pocket smoke outlet flue 28; Fly-ash separator 29; Water intaking valve
Fig. 2 is the radiation water-cooled screen synoptic diagram of converter gas radiation formula waste heat boiler recovery system of the present invention.
25, connect steel plate between radiation water-cooled screen 30, weldless steel tube 31, the steel pipe
Embodiment
Below in conjunction with accompanying drawing the present invention is done explanation further.
Embodiment:
As shown in Figure 1: converter gas radiation formula waste heat boiler recovery system of the present invention, the movable flue (2), converter that comprises converter (1) be flue (3), T-valve (6), settling pocket flue (7), settling pocket (26), spray cooling device (5), settling pocket smoke outlet flue (27), radiation formula waste heat boiler (14), thermophore (16), deoxygenator (17) fixedly; Fixedly the bend pipe top of flue (3) is by dress T-valve (6) in converter, and an end of T-valve connects the fixedly outlet on the flue of converter, and the other end connects the flue (7) of settling pocket (26), the flue of the 3rd end connection spray cooling device (5); Settling pocket (26) smoke outlet flue (8) links to each other with the current-sharing chamber (10) of radiation formula waste heat boiler (14).
Radiation formula waste heat boiler of the present invention (14) is by drum (9), flue gas flow equalizing chamber (10), water-cooled radiation heat transfer chamber (11), boiler intermediate sedimentation chamber (24), ash exhauster (23), convection heat-exchange chamber (22), boiler exhaust gas road are housed;
Settling pocket of the present invention (26) is connected the flue gas flow equalizing chamber (10) of radiation formula waste heat boiler (14) with boiler flue (8) through settling pocket smoke outlet flue (27); Flue gas flow equalizing chamber (10) connects water-cooled radiation heat transfer chamber (11) front end; Rear end, water-cooled radiation heat transfer chamber (11) connects boiler intermediate sedimentation chamber (24); Boiler intermediate sedimentation chamber (24) connects convection heat-exchange chamber (22) front end, and the rear end of convection heat-exchange chamber (22) links to each other with boiler exhaust gas flue (15).
The drum of radiation formula waste heat boiler of the present invention (9) is established the outer steam-pipe (13) that supplies, and supplies to establish on the steam-pipe (13) thermophore (16) outward;
Radiation water-cooled screen (25) is established in water-cooled radiation heat transfer of the present invention chamber (11).
Radiation water-cooled screen of the present invention (25) is welded into the screen formula through steel plate each other by row's steel pipe; Radiation water-cooled screen (25) suspension is installed in water-cooled radiation heat transfer indoor (11); The upper end of radiation water-cooled screen (25) links to each other with drum (9) through pipeline, header, and the lower end of described radiation water-cooled screen (25) links to each other with drum (9) through pipeline, header.
Convection heat-exchange chamber of the present invention (22) is established vaporizer (21), high-temperature economizer (20) and low-level (stack-gas) economizer (19); Described high-temperature economizer (20) outlet is connected with drum (9) through pipeline, and described high-temperature economizer (20) import links to each other with deoxygenator (17) through pipeline, water pump.
Ash exhauster (23) is established in bottom, boiler intermediate sedimentation of the present invention chamber (24).
Gasification cooling flue vapour of the present invention (4) bag is parallelly connected with radiation formula waste heat boiler drum (9) and thermophore (16).
Flue gas process flow process of the present invention is: 1300～1800 ℃ of high-temperature flue gas that in the process of bessemerizing, will produce, to the flue gas that is produced, at first detect the oxygen level in the flue gas: (O when () requires when the satisfied recovery of oxygen level
2Concentration＜1%), T-valve (6) is opened the valve to settling pocket (26), closes the valve that leads to spray cooling device (5) simultaneously; High-temperature flue gas will get into settling pocket (26) through settling pocket flue (7), in settling pocket (26), remove the macrobead dust in the flue gas, and high-temperature flue gas gets into the current-sharing chamber (10) of radiation formula waste heat boiler (14) through settling pocket smoke outlet flue (27) and boiler flue (8) then; Current-sharing chamber (10) makes flue gas evenly get into water-cooled radiation heat transfer chamber (11), and after high-temperature flue gas and radiation water-cooled screen (25) and membrane wall (12) heat exchange, flue-gas temperature will decline to a great extent; Usually flue-gas temperature is reduced to 400～600 ℃, and the volume of flue gas reduces significantly, and flue gas flow rate also significantly reduces; Get into boiler intermediate sedimentation chamber (24) this moment, carries out final dusting, and the ash fall of part larger particles is got off; Flue gas gets into convection heat-exchange chamber (22) then; In uphill process with vaporizer (21), high-temperature economizer (20), low-level (stack-gas) economizer (19) heat exchange after, discharge through boiler exhaust gas flue (15) temperature of flue gas＜150 ℃; After sending the fly-ash separator dedusting, reclaim the use that acts as a fuel by gas holder; (2) (O when oxygen level exceeds standard
2Concentration＞1%); T-valve (6) will be closed the valve that leads to settling pocket (26); Open the valve that leads to spray cooling device (5) simultaneously, open the water intaking valve (29) of spray cooling device, high-temperature flue gas will get into spray cooling device (5) and carry out spray cooling; Flue gas after the cooling (temperature＜200 ℃) discharges after sending fly-ash separator (28) dedusting.
Steam flow process of the present invention is: after soft water make up water or steam turbine condensed water heat through low-level (stack-gas) economizer (19); Send into deoxygenator (17) deoxygenation, the water after the deoxygenation is sent into drum (9) after high-temperature economizer (20) heating is delivered in service pump (18) pressurization; Water in the drum absorbs flue gas heat through radiation water-cooled screen (25), membrane wall (12) and vaporizer (21); Produce steam, the steam in the drum (9) links to each other with thermophore (16) through the outer confession steam-pipe (13) on drum top, through thermophore (16); Make the outer pressure-stabilisation that supplies steam, satisfied production and life are used; The steam that radiation formula waste heat boiler (14) is produced is parallelly connected with the steam that gasification cooling flue is produced.
The above only is a preferred implementation of the present invention; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (7)
1. converter gas radiation formula waste heat boiler recovery system; The movable flue (2), converter that comprises converter (1) be flue (3), T-valve (6), settling pocket smoke-intake pipe (7), settling pocket (26), settling pocket smoke outlet flue (27), boiler flue (8), radiation formula waste heat boiler (14), thermophore (16), deoxygenator (17) fixedly; It is characterized in that: T-valve (6) is established in the described converter fixedly bend pipe top of flue (3); One end of said T-valve connects the fixedly outlet on the flue of converter; The other end connects the settling pocket smoke-intake pipe (7) of settling pocket (26), and the 3rd end connects the flue of spray cooling device (5).
2. converter gas radiation formula waste heat boiler recovery system according to claim 1 is characterized in that: described settling pocket (26) links to each other with the boiler flue (8) of radiation formula waste heat boiler (14) through settling pocket smoke outlet flue (27).
3. converter gas radiation formula waste heat boiler recovery system according to claim 1; It is characterized in that: described radiation formula waste heat boiler (14) is established drum (9), boiler flue (8), flue gas flow equalizing chamber (10), water-cooled radiation heat transfer chamber (11), boiler intermediate sedimentation chamber (24), ash exhauster (23), convection heat-exchange chamber (22); Described boiler flue (8) connects the flue gas flow equalizing chamber (10) of radiation formula waste heat boiler (14); Flue gas flow equalizing chamber (10) connects water-cooled radiation heat transfer chamber (11) front end; Rear end, water-cooled radiation heat transfer chamber (11) connects boiler intermediate sedimentation chamber (24); Boiler intermediate sedimentation chamber (24) connects convection heat-exchange chamber (22) front end, and the rear end of convection heat-exchange chamber (22) links to each other with boiler cigarette flue (15).
4. converter gas radiation formula waste heat boiler recovery system according to claim 2 is characterized in that: the drum of described radiation formula waste heat boiler (9) is established the outer steam-pipe (13) that supplies, and supplies to establish on the steam-pipe (13) thermophore (16) outward; Radiation water-cooled screen (25) is established in described water-cooled radiation heat transfer chamber (11).
5. converter gas radiation formula waste heat boiler recovery system according to claim 4; It is characterized in that: described radiation water-cooled screen (25) is welded into the screen formula through steel plate each other by row's steel pipe; Described radiation water-cooled screen (25) suspension is installed in water-cooled radiation heat transfer indoor (11); The upper end of said radiation water-cooled screen (25) links to each other with drum (9) through pipeline, header, and the lower end of described radiation water-cooled screen (25) links to each other with drum (9) through pipeline, header.
6. converter gas radiation formula waste heat boiler recovery system according to claim 3; It is characterized in that: described convection heat-exchange chamber (22) is established vaporizer (21), high-temperature economizer (20) and low-level (stack-gas) economizer (19); Described high-temperature economizer (20) outlet is connected with drum (9) through pipeline, and described high-temperature economizer (20) import links to each other with deoxygenator (17) through pipeline, water pump.
7. converter gas radiation formula waste heat boiler recovery system according to claim 3, ash exhauster (23) is established in bottom, described boiler intermediate sedimentation chamber (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110311056.5A CN102321779B (en) | 2011-10-14 | 2011-10-14 | Converter smoke radiation type waste heat boiler recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110311056.5A CN102321779B (en) | 2011-10-14 | 2011-10-14 | Converter smoke radiation type waste heat boiler recovery system |
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| CN102321779A true CN102321779A (en) | 2012-01-18 |
| CN102321779B CN102321779B (en) | 2014-04-16 |
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| CN201110311056.5A Expired - Fee Related CN102321779B (en) | 2011-10-14 | 2011-10-14 | Converter smoke radiation type waste heat boiler recovery system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559991A (en) * | 2012-03-01 | 2012-07-11 | 九源天能（北京）科技有限公司昆明分公司 | State transition device capable of achieving uninterrupted heat energy output and utilization for steelmaking converter |
| CN103982884A (en) * | 2014-04-25 | 2014-08-13 | 孙慕文 | Multi-radiation evaporation screen afterheat boiler |
| CN104061793A (en) * | 2014-04-30 | 2014-09-24 | 上海宝钢节能环保技术有限公司 | Step-by-step waste heat recovery system and method for electric furnace flue gas on whole temperature section |
| CN104531945A (en) * | 2014-12-12 | 2015-04-22 | 中冶南方工程技术有限公司 | Device and method for recycling waste heat of low-temperature section of primary flue gas of converter |
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| CN202297656U (en) * | 2011-10-14 | 2012-07-04 | 孙慕文 | Converter-smoke recycling system for radiation type exhaust-heat boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102559991A (en) * | 2012-03-01 | 2012-07-11 | 九源天能（北京）科技有限公司昆明分公司 | State transition device capable of achieving uninterrupted heat energy output and utilization for steelmaking converter |
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| CN103982884A (en) * | 2014-04-25 | 2014-08-13 | 孙慕文 | Multi-radiation evaporation screen afterheat boiler |
| CN104061793A (en) * | 2014-04-30 | 2014-09-24 | 上海宝钢节能环保技术有限公司 | Step-by-step waste heat recovery system and method for electric furnace flue gas on whole temperature section |
| CN104061793B (en) * | 2014-04-30 | 2016-06-15 | 上海宝钢节能环保技术有限公司 | A kind of electric furnace flue gas temperature section waste heat recovery system step by step and method entirely |
| CN104531945A (en) * | 2014-12-12 | 2015-04-22 | 中冶南方工程技术有限公司 | Device and method for recycling waste heat of low-temperature section of primary flue gas of converter |
| CN104531945B (en) * | 2014-12-12 | 2016-09-21 | 中冶南方工程技术有限公司 | Flue gas low-temperature section waste-heat recovery device of converter and method |
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| CN102321779B (en) | 2014-04-16 |
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